共查询到18条相似文献,搜索用时 70 毫秒
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数学形态学在绝缘子泄漏电流在线监测中的应用 总被引:2,自引:0,他引:2
为了提高染污绝缘子污秽程度预测的准确性,分析了常用的几种泄漏电流去噪方法所存在的缺陷,引入了数学形态学算法,对绝缘子运行过程中安全区和预报区的泄漏电流进行了降噪处理,确定了相应的形态学结构元素,构造了新型广义多结构元素串行复合形态滤波器.实验表明:该滤波器较好地改善了泄漏电流信号的波形,易于在实际工程中实现,可进一步提高对绝缘子污秽程度预测的准确性. 相似文献
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本文基于LabV IEW软件和PC I-1712L数据采集卡,构建一种MOA信号采集与分析处理系统,该系统能够在线监测基波阻性电流和介质损耗因素的变化,并具有友好的人机界面。 相似文献
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针对传统避雷器的泄漏电流表的状态监视形式已不能满足现实工作需要的问题,介绍了一种分布式避雷器阻性电流采集和计算的新方法,并给出了模拟量数字化的采样计算过程,对相间干扰采用完善的干扰补偿算法,消除了相间干扰对阻性基波电流计算的影响。现场实际运行情况表明,该系统所采用的方法和算法能有效计算出避雷器运行的特征参量,并可真实地反映避雷器的运行状态。 相似文献
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针对当前火电机组热力系统间泄漏状况主要依靠人工监测,隐蔽泄漏不易被发现,易导致机组能耗无谓升高,影响机组运行的安全性及经济性的情况,提出基于模糊C均值聚类算法对系统运行数据进行挖掘,并将相关数据划分为正常状态或泄漏状态两类区域;再通过加动量误差反向传播(BP,back propagation)神经网络对系统实时表征参数进行分类。设计了火电机组多能级系统泄漏智能在线监测系统,在实际应用中该监测系统所监测火电机组热力系统的范围包含锅炉疏放水系统、高低压旁路系统等,涉及隔离界面150个以上。统计结果显示:监测成功率达81.8%,监测结果更加可靠。 相似文献
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讨论了基于DSP CPLD模式的变电站电气设备在线监测采集系统。以断路器为例介绍了系统硬件结构、工作原理,提出利用DSP CPLD模式扩展系统外围器件,并分析了这种硬件结构的优势。最后得出结论。基于DSP CPLD模式的硬件系统将以其高速度、高集成度和高可靠性在电气设备在线监测中发挥重要作用。 相似文献
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电能质量是电力工业产品的重要指标,国家已制定了电能质量相关的法律、法规和标准,对电网电能质量实行技术监督已势在必行,而电能质量的监测则是电能质量技术监督的重要手段.重点阐述了在电能质量监测的内容、实现方法及对电能质量监测仪的要求.并提出了上海市电能质量在线监察的初步方案设想. 相似文献
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Experimental analysis of internal leakage current using a 100 cm2 class planar solid oxide fuel cell
《International Journal of Hydrogen Energy》2021,46(62):31807-31815
This work studies the effect of the electronic conductivity of a commercially used yttria-stabilised zirconia (YSZ) electrolyte on solid oxide fuel cell performance. For the first time, an experimental method is used to measure the electronic conductivity of YSZ in commercially manufactured and operated single cells. An inert-gas step addition (ISA) method is employed to measure the electronic conductivity in the form of voltage changes at the open-circuit state. Since the electronic conductivity allows oxide ion transfer and water generation at the anode, a reduction in open-circuit voltage (EOCV) occurs due to the increased water partial pressure. The step increase in the anode flow rate in the ISA method reduces water partial pressure and raises EOCV. The EOCV change is then converted into internal leakage currents and electronic resistivities. The YSZ's electronic resistivity obtained in this work is comparable to the results obtained using the Hebb-Wagner polarisation technique and the oxygen permeation method. 相似文献
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This paper describes a remote monitoring system that can be set up in an operating center to monitor the state of valve regulated lead acid batteries (VRLA) used as a backup power supply for telecommunications. This system has a battery voltage monitoring function, a lifetime prediction function based on ambient temperature, and a discharge circuit diagnosis function. In addition, the system can be equipped with an internal resistance measurement function and an electrolyte leakage detection function to further insure power-supply reliability. Various states of batteries observed with the system are transmitted to the remote operating center by a remote monitoring function. This function enables obtaining immediate information about the condition of batteries and helps to avoid unexpected failures. 相似文献